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Finding the Fourth Proportional to 659.64, 910.20 and 379.88

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Solution

The fourth proportional to 659.64, 910.20 and 379.88 is: 524.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.64 : 910.20 = 379.88 : x
  2. Step 2: Convert to fraction form
    659.64/910.20 = 379.88/x
  3. Step 3: Cross multiply
    659.64x = 910.20 × 379.88
  4. Step 4: Simplify right side
    659.64x = 345,770.05
  5. Step 5: Solve for x
    x = 345,770.05/659.64
  6. Step 6: Final answer
    x = 524.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.